spiral vessel

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• spiral vessel — noun : a trachea or vessel having the walls spirally thickened called also spiral duct …   Useful english dictionary

• spiral duct — noun : spiral vessel …   Useful english dictionary

• spiral spring — Spring Spring, n. [AS. spring a fountain, a leap. See {Spring}, v. i.] 1. A leap; a bound; a jump. [1913 Webster] The prisoner, with a spring, from prison broke. Dryden. [1913 Webster] 2. A flying back; the resilience of a body recovering its… …   The Collaborative International Dictionary of English

• Vessel element — A vessel element is one of the cell types found in xylem, the water conducting tissue of plants. Vessel elements are typically found in the angiosperms but absent from most gymnosperms such as the conifers. Vessel elements are the building blocks …   Wikipedia

• Spiral (Buffy episode) — Infobox Television episode Title=Spiral Series=Buffy the Vampire Slayer Season=5 Episode=20 Airdate=May 8 2001 Production=5ABB20 Writer=Steven S. DeKnight Director=James A. Contner Episode list=List of Buffy the Vampire Slayer episodes Prev=Tough …   Wikipedia

• Empty vessel — The phrase empty vessel literally means a container with nothing inside. It has additional significance in various areas.In literatureThe quotation, As empty vessels make the loudest sound, so they that have the least wit are the greatest… …   Wikipedia

• Air vessel — Air ves sel A vessel, cell, duct, or tube containing or conducting air; as the air vessels of insects, birds, plants, etc.; the air vessel of a pump, engine, etc. For the latter, see {Air chamber}. The air vessels of insects are called trache[ae] …   The Collaborative International Dictionary of English

• ear, human — ▪ anatomy Introduction       organ of hearing and equilibrium that detects and analyzes noises by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium).  The human ear, like …   Universalium

• angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

• circulation — circulable /serr kyeuh leuh beuhl/, adj. /serr kyeuh lay sheuhn/, n. 1. an act or instance of circulating, moving in a circle or circuit, or flowing. 2. the continuous movement of blood through the heart and blood vessels, which is maintained… …   Universalium

• Artery — A vessel that carries blood that is high in oxygen content away from the heart to the farthest reaches of the body. Since blood in arteries is usually full of oxygen, the hemoglobin in the red blood cells is oxygenated. The resultant form of… …   Medical dictionary